2.3
Low
CVE-2026-61477 Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection
Description
An injection vulnerability was found in libvirt's virtual network driver. The network XML parser does not strip newline characters from DNS TXT record value attributes and SRV record domain/target attributes. These values are written verbatim into the dnsmasq configuration file generated by the network driver, allowing a user with permission to define virtual networks to inject arbitrary dnsmasq configuration directives such as dhcp-script, leading to arbitrary command execution as root.
CVSS 3.1 detail
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:NExploitable with local access to the machine, with an administrator account and without any user action; the impact on data or service is limited.
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- High
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Enterprise Linux for NVIDIA 26 | Versions not published |
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Not rated